A seven minute epilogue to the TV series, released as an OVA.

Three oni-kids who, through the power of the onipan (a portmanteau of oni and pantsu) become human to help fix the relationship between humans and oni. The three girls transfer into a normal Tokyo high school to aid in their task and help fix their image by revitalizing the town, sometimes jumping headfirst into school events, and other times...becoming idols! (Source: Crunchyroll News)

Mana Shikimiya has just transferred into Marehoshi Academy, a school which requires each of its students to join one of the many sports or cultural clubs. After a quick tour of most of the clubs by the Student Council Vice President Minori Hasegawa, Mana stumbles upon the Lyrical Tradition Dance Club. There she meets its sole members: Mizuha Ichikishima and Sayu Tsukisaka. Drawn to their singing and dancing, Mana joins the club and together they work towards their dream of winning the Prism Stage—a national competition to determine the top idols of the country. However, before Mana and her new friends can worry about the Prism Stage, there is a more immediate problem at hand: the club is about to be disbanded by the student council! Without enough members or any notable achievements, the club will be shut down and the members' dreams will be over before they've begun to pursue them. It's up to the three of them to find the additional club members they need and become an idol group strong enough to qualify for the Prism Stage and to win it as well.

Chika Suzugamori, an 18-year-old newcomer manga artist, has just had three of her drafts rejected in a single day. Her editor suggests incorporating her interests into her work, but Chika is an indoor person who only thinks about manga day and night. At a loss, she feels a sudden desire to get away from everything and go on a journey somewhere. Due to the results of an online poll that she posted on a whim, Chika hops on a train and heads north from Tokyo on an impromptu solo trip. When she ends up at the top of Mount Haguro in Aizu-Wakamatsu, she realizes she feels refreshed and more motivated than before. Even if her projects get turned down again in the future, Chika plans to journey around Japan with friends old and new.